Separable fastener slider



July 21, 1936. B KQTOWSKI 2,048,636

SEPARABLE FASTENER SLIDER Filed May 26, 1954 INVEN TOR. Bernard A.Koiowslti f A NEYS.

Patented July 21, 1936 UNITED, STATES SEPARABLE FASTENER SLIDER Bernard A. Kotows ki, Meadville, Pa., assignor to Hookless Fastener Company, a corporation of Pennsylvania Application May 26, 1934, Serial No. 727,757

F 8 Claims.

This invention relates to 'slidefasteners and more particularly to locking sliders for slide fastenets. Various types of locking sliders have been proposed and many of them have been actually used for the purpose of preventing the slider slipping along the rows of fastener members and allowing the fastener to open up unintentionally. r

The present invention is an improvement on the locking'slider construction shown in the Whitney Patent No. 1,858,351, May 1'7, 1932, which discloses the idea of slitting away a portion of the top wing and providing a cam memher for flexing such'slitted portion into contact with the fastener members. According to the present invention, no attempt is made to flex the outer flanged parts of the slider but instead this invention provides a central shoe which'is integrally but flexibly connected to the remaining portions of the wing. It will bepppreciated that the amount of metal available in a small slider is quite small and it is therefore convenient to attach the pull to two loops and form the locking shoe from metal between-such loops. The pull member is attached to the loops and carries a cam between the loops for acting on the locking 5 0e. In the accompanying drawing, I have shown for purposes of illustration two embodiments which my invention may assume in practice. In the drawing:

Fig. 1 is a plan view of a slide fastener embodying my invention;

2 is a longitudinal section on line 22 of Fig. 1;

Fig. 3 is a cross-section on line 33 of Fig. 1; Fig. 4 is a Perspective view of the slider detached:

Fig. 5 is aplan view of a modified form of slidand Fig. 6 is a longitudinal'central section through F18. 5.

The slide fastener comprises.rows of fastener elements 1 arranged in uniformly spaced relation on the edges of a pair of tapes 8. The form of fastener elements and tape constitutes no part of the present invention, and it will be understood that they might be of any well-known form. It is suflicient to say here that they are formed with appropriate interlocking parts which can be quickly engaged and disengaged by a slider. The slider 9 has a Y-shaped channel through which the fastener members are guided during engagement and disengagement.

65 Referring to Fig. 4, the slider comprises top and bottom sheet metal wings 10, ll, respective- I ly, having side flanges l2 and integrally connected at one end by a relatively thick neck I3. A pair of loops ll are struck up from the metal of the top wing on opposite sides of the central 5 portion and a pull tab J5 is pivotally mounted in said loops. The central portion of theslider is cut out to provide a locking shoe in the form of a square block l6 which is integrally connected to the slider by a narrow section' of metal con- 10 stituting a flexible arm I'I. Preferably the connection is with the forward or narrow end of the slider since, in this-manner, the armcan be made longer and it will not extend into the thickened neck portion l3.

In the modified construction shown in Figs. 5 and 6, the locking shoe I8 is similar to the locking shoe I 6 but is connected at its back end to the slider wing which necessitates the loops l4 being located farther from the rear end of the slider. 20 In order to make the connection more flexible in this instance, the metal is thinned or necked down as shown at I9 and in this case, the connecting arm need not be-any narrower than the shoe itself. The working of the metal in-thin- 25 ning the neck at l9 increases the resilience of the connection.

The pull tab l5 carries cams 20 disposed on opposite sides and in the same transverse line as the pivot. When swung down against the slider 30 in either direction one or the other of thesecams will bear against the locking shoe and depress it into engagement with the fastener elements, thus causing theslider to be frictionally held against movement on the fastener members. The 5 resiliency of the arm I! will lift the locking shoev away from the'fastener elements as soon as the pull tab is lifted.

While I have shown and described in this application two embodiments which my invention may assume in practice, it will be understood that these embodiments are merely for the purposes of illustration and description and that various other forms may be devised within the scope of my invention as defined in the appended 5 claims.

What I claim as my invention is:

"1. In a slide fastener having rows of fastener elements, a slider movable along said elements to engage or disengage them, said slider comprising parallel wings having channels for guiding interlocking members, a connection between said wings, one wing having an opening, a relatively wide shoe movable through said opening into engagement with the fastener elements, said shoe being integrally connected to the wing by a relatively narrow resilient arm, and a cam member attached to the slider for depressing said shoe into engagement with the fastener elements to lock the slider.

2. In a slide fastener having rows of fastener elements, a slider movable along said elements to engage and disengage them, said slider comprising sheet metal wings, the top wing having a central portion cut out to provide a relatively wide locking shoe integrally connected by a relatively narrow arm with the said top wing, a pull tab pivotally secured to the top wing adjacent said shoe and having a cam adapted todepress said shoe into engagement with the fastener elements for locking the slider.

3. In a slide fastener having rows of fastener elements, a slider movable along said elements to engage and disengage them, said slider comprising parallel wings having channels for guiding interlocking members, a neck integral with said wings for connecting them at one end, said wings having flanges along their side edges, a portion of the metal of one wing being cut away from said wing except for a relatively wide locking shoe and narrow flexible connection, and a pull tab pivoted to said top wing adiacent said shoe and having a cam for depressing said shoe into locking engagement with the fastener elements, said locking shoe being movable relative to the flanges of the slider. 4. In a slide fastener having rows of fastener elements, a slider movable along said elements to engage and disengage them, said slider comprising parallel wings integrally connected at one end, a relatively wide locking shoe cut out from the central portion of one of said wings and connected to such wing by a relatively narrowres'ilient arm, a pair of pull attaching loops at opposite sides of said arm, a pull tab pivotally connected to said loops having a cam arranged between said loops for depressing said locking shoe into engagement with the fastener elements.

5. A slider for a slide fastener having rows of fastener elements comprising means movable along said elements to engage and disengage them, said means including parallel wings having channels for guiding interlocking members,

a connection between said wings, one wing having an opening, a locking shoe of relatively large cross-section movable through said opening into engagement with the fastener elements, said shoe being integrally connected to the wing by a resilient connectioin of relatively small crosssection, and a cam attached to the slider for holding the shoe in engagement with the fastener elements to lock the slider.

6. In a slide fastener having rows of fastener elements, a slider movable along said elements to engage or disengage them, said slider comprising parallel wings having channels. for guiding interlocking members, a connection between said wings, one wing having an opening, a shoe movable through said opening into engagement with the fastener elements, said shoe being integrally connected to the wing by a resilient arm, said arm being thinner than said shoe, and a cam member attached to the slider for depressing said shoe into engagement with the fastener elements to lock the slider.

7. In a slide fastener having rows of fastener elements, a slider movable along said elements to engage or disengage them, said slider comprising parallel wings having channels for guiding interlocking members, a connection between said wings, one wing having an opening, a shoe movable through said opening into engagement with the fastener elements, said shoe being integrally connected to the wing by a resilient arm ofcompressed wing material, and a cam member attached to the slider for depressing said shoe into engagement with the fastener elements to lock the slider.

8. In a slide fastener having rows of fastener elements, a slider movable along said elements to engage or disengage them, said slider comprising parallel wings having channels for guiding interlocking members, a connection between said wings, one wing having an opening, a shoe movable through said opening into engagement with the fastener elements, said shoe being integrally connected to the wing by a resilient arm, the material of the arm being worked to increase its resiliency, and a cam member attached to the slider for depressing said shoe into engagement with the fastener elements to lock the slider.

BERNARD A. KOTOWSKI. 

